Piano-stringing hammer.



PATEN TED MAY 15. 1906.

C. J. HINDMAN. PIANO STRINGING HAMMER.

APPLICATION FILED SEPT, 14. 1905.

UNITED STATES PATENT OFFICE.

PIANO-STRINGING HAMMER.

Specification of Letters Patent.

Patented May 15, 1906.

Application filed September 14, 1905. Serial No. 278,518.

To all whonc it may concern:

Be it known that I, OARLos J. HINDMAN, a citizen of the United States,residing at Marion, in the county of Linn and State of Iowa, haveinvented certain new and useful Improvements in Piano-Stringing Hammers,of which the following is a specification.

The object of this invention is to produce an instrument for stringingpianos which is adapted to automatically lay the wrap on the tuning-pegin a neat and symmetrical coil.

The nature of the invention, which is very simple, will clearly appearfrom the descrip tion and claim following, reference being had to theaccompanying drawings, in which- Figure 1 is a side view of astringing-hammer embodying my invention. Fig. 2 is a vertical section ofthe lower part thereof in the same plane as Fig. 1 or a parallel plane.

The improvement which forms the subjectmatter of this invention is theresult of a con sideration of the needs of blind musicians who tunepianos. Owing to their infirmity and also to the closeness of thetuning-pegs to each other in the frame, it is practically impossible fora blind tuner by the use of his fingers to guide the piano-string as itcoils on the peg, so as to produce a smooth and uniform coil. Theimproved tool enables him to do this and without the trouble or labor ofusing his fingers among the pegs at all. It is equally convenient forthe tuner who has the use of all his senses.

Referring now to the nates the hammer, with a socket-wrench B securedthereto adapted to take the squared head of the tuning-peg C. Anenlarged portion D of this wrench or shank is screwdrawings, Adesigthreaded, and on this is screwed a milled handpiece E, small enoughwith a reduced lower end F to pass down among the pegs G to engage theThe screwthread may be either righthanded or the reverse, as shown. Ifthe thread is left-handed, as shown in Fig. 1, and the wrench turned tothe right, the coil will be laid on the peg downwardly. The same actionapplied to the device shown in Fig. 2 would coil the string upwardly onthe peg. When the string has been brought to the proper pitch, thehandpiece is released from the string either by turning it forward orfirst backing off the wrench, when the hand piece is of course moreeasily turned forward a little to disengage the hook.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

An improved stringing-hammer, having a socket-wrench to engage thetuning-pegs, a screw-threaded portion thereon, and a handpiececorrespondingly screw-threaded to run thereon, the handpiece having ahook at its lower end to engagethe string, and whereby a uniform coil ismade as the wrench is turned and the handpiece held.

In testimony whereof I aifix in presence of-two witnesses.

CARLOS J. HINDMAN. Witnesses J. M. ST. JOHN, F. J. KULIcEK.

my signature

